Swivel-nut



H. P. KRAFT.

SWIVEL NUT. APPLICATION FILED APR. 22. 1918. RENEWED JULY 3, 1919.

1,330,594. I Patented Feb. 10,1920.

.3 E jigg- INVENTOR WITNESS: By Attorneys,

5mm QM M UNITED STATES PATENT OFFICE.

- ,nnmwir.

Specification Letters latent.

Mr, or nmenwoon, New-Jansen Application filed April 22, 1918, Serial no. 229,898. aenewea m a, 1919. Serial in. 308,586.

To all whom it may concern: g

Be it known that Ig HE-NRY P; KRAFT, a

' citizen of the United States of America ments in Swivel-Nuts of which the o1low residing in Ridgewood, in the countypo Bergen and State of New Jersey, vented certain new and useful Im roveing is a specification.

= swiveled to it, so that as that is to say, the nut proper has arms orwings projecting on diametrically opposite sides,'so that the nut can be turned by the I the nut is struck up from s the special conformation and constructlon,

' proper an Such nuts are used in thumb and finger.

large quantities, and it is desirable to be able to make them with great cheapnes s. They have heretofore been cut out of SOlld metal. According to the which will be described.

In the acompanying drawings, 1 Figure 1 is a side elevation-of a swivel nut embodying the present invention; Fig. 2 is a plan thereof;

Fig. 3 is a mid-section on the line 3- -3 of Fig. 2;

ig. 4 is an inverted plan of the nut proper, its lower ortion being in section on the line 4-4 in Fig. 3;

- Fig. 5 is a transverse section on the line 55 in Fig. 2;

, Fig. 6 is a transverse section on the line e-s in Fig. 4.

Fi 7 is a whic the nut 1s formed.-

' Referrin tothe drawings, Ais the nut B is the swivel washer. nut A has wings or arms C O and a central body portion D in cup form, within which is a neck portion E inwhich' the screwthread is formed. I I g The washer A is formed by-stamping out a blank a, shown in Fig. 7, from a flat sheet of I brass or other meta plate. Its marginal portions b outside the dotted lines o are turned down 'by a stampin operation. The central portion indicated y the area d in Fig. 7 is forced down by a drawing operation and punched through to form the cenhave m "two pan mg the reduced lower end of the neck present invention, eet metal having plan' the. stamping from The Patented Feb. 10, 19 20.

tral neck E; By' a final stamping or. draw- I shape shown. flTwo operations then remain,

namely, the cutting of the screw-thread within the neck E, and the reducing of the outer portion of the neck at its bottom end so that it may form a close but free joint with the hole'through the washer B. The

arts A and B are then united by exat e, whereby to form a loose but secure joint with the washer, this joint bein so'loose as to permit the free rotation of t e nut relatively to the washer.

The finished product has the cupped body portion D with its outer pendant rim f extending down to and bearing upon the to of the washer, as shown in F1g. 5. This afi'ords a broad bearing which gives a steady and non-tilting engagement between the two members and relieves the swivel joint of any strain. When in use .the nut has substantially the appearance of a solid nut, and by reason of t e corrugat' of the metal and the stifl'enin effect of t fe stamping operations, theho low nut has the same effective strength as a solid nut. At the same time it is much more cheaply produced, and is applicable for practlcall eve purpose for which SOlld. nuts have ereto ore been used. The construction may be varied within the scope of the a pended. claimswithout departing from t e invention. v

I claim as my invention 1. A nut formed of sheet metal, compris- I 'mg an outer cupped body portion and a central screw-threa ed neck extending through and inclosed within the outer body portion, and the body portion terminating in an outer rim ada ted to afford a firm bearing against a was er.

2.;A swivel prising a cupped body portion having a central threaded neck and an outer rim portion lnclosin'g the neck and forming an edge bearing, and wings projecting from the 'opl posite sides of the body.

nut comprising a nut proper and washer, the nut proper formed of 4. A nut formed of a single piece of elonated sheet metal having its end ortions olded together to form wings and its middle portion cuppled, and with a central threaded neck wt in the cupped portion.

5. A nut of sheet metal, comprising an outer cupped body portion and an inner cylindrical undivided threaded neck portion,

- I the rim of the body portion extended to nearly the same plane s the neck portion and adapted to serve as the bearing face of the nut.

6. A nut formed'of sheet metal comprising an outer cupped body portion and a central screw-threaded neck of one thickness of metal extendin through and inclosed within the outer bo dy portion, and the body portion terminating 1n an outer rim adapted I to afford an edge bearing, and a Washer associated therewith to receive such bearing.

7. A nut formed of sheet metal comprising an outer cupped bod portion and a central neck extending wit in and inclosed by said body portion, the neck having alscrew threaded passage extending through it, and the metal of the body portion being elongated and folded to form Wings,

In witness whereof, I have hereunto signed my name.

HENRY P. KRAFT. 

